Truitje (Truytgen) Gysbertsdochter, an Anabaptist martyr, who with her husband Claes Jansz van Oostsanen (Oostzanen) had joined the exodus of Dutch Anabaptists from Amsterdam to Münster in March 1534, sailing over the Zuiderzee. The group was arrested near Bergklooster. On 27 August 1534 Truitje was sentenced to death by drowning and her husband by beheading. They were probably executed at The Hague.